[s1e13] Betrayal Online

: Oliver confronts Moira with his father's list of names. While she initially lies, claiming the yacht sabotage was an accident, Diggle's surveillance eventually provides definitive proof of her involvement with Malcolm Merlyn. This culminates in a dramatic final scene where Oliver, in his vigilante persona, crashes through his mother's office window and tells her she has "failed this city".

The main plot follows recently released master criminal , played by David Anders, who intends to reclaim his throne in the underworld by taking down the vigilante known as "The Hood". [S1E13] Betrayal

You can find this episode on major streaming platforms and retailers: Arrow recap: Betrayed by the Best - Entertainment Weekly : Oliver confronts Moira with his father's list of names